Internet Engineering Task Force (IETF) Y. Weingarten, Ed.
Request for Comments: 6378 Nokia Siemens Networks
Category: Standards Track S. Bryant
ISSN: 2070-1721 E. Osborne
Cisco
N. Sprecher
Nokia Siemens Networks
A. Fulignoli, Ed.
Ericsson
October 2011
MPLS Transport Profile (MPLS-TP) Linear Protection
Abstract
This document is a product of a joint Internet Engineering Task Force
(IETF) / International Telecommunications Union Telecommunications
Standardization Sector (ITU-T) effort to include an MPLS Transport
Profile within the IETF MPLS and Pseudowire Emulation Edge-to-Edge
(PWE3) architectures to support the capabilities and functionalities
of a packet transport network as defined by the ITU-T.
This document addresses the functionality described in the MPLS-TP
Survivability Framework document (RFC 6372) and defines a protocol
that may be used to fulfill the function of the Protection State
Coordination for linear protection, as described in that document.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6378.
Weingarten, et al. Standards Track [Page 1]RFC 6378 MPLS-TP LP October 2011Copyright Notice
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Weingarten, et al. Standards Track [Page 2]RFC 6378 MPLS-TP LP October 2011Table of Contents
1. Introduction ....................................................4
1.1. Protection Architectures ...................................4
1.2. Scope of the Document ......................................5
2. Conventions Used in This Document ...............................6
2.1. Acronyms ...................................................6
2.2. Definitions and Terminology ................................7
3. Protection State Control Logic ..................................7
3.1. Local Request Logic ........................................9
3.2. Remote Requests ...........................................11
3.3. PSC Control Logic .........................................12
3.4. PSC Message Generator .....................................12
3.5. Wait-to-Restore (WTR) Timer ...............................12
3.6. PSC Control States ........................................13
3.6.1. Local and Remote State .............................14